surah al an'am 06:165 -
It is He who made you the vicegerents of the earth and raised some of you in ranks over others, so that He may test you in what He has given you. Surely, your Lord is swift in punishing, and surely He is Most-Forgiving, Very-Merciful. (END) - Commentary : And He it is Who has made you successors (khala’if is the plural of khalifa), in other words, [He has made you] to succeed one another therein, in the earth and has raised some of you above others in degrees, through wealth and status and otherwise, so that He may try you, that He may test you, in what He has given you, in order to manifest the obedient among you and the disobedient. Surely your Lord is swift in punishment, of those who disobey Him; and surely He is Forgiving, to believers, Merciful, to them.
